If your daughter is being treated with antibiotics, the fever (core temperature > 100.4) should resolve by 2-3 days of antibiotic use. If you have been asked to “watch and wait,” most fevers caused by viruses will begin to improve at about 2-3 days as well. Check in with your pediatrician if it persists for more than 3 days.

it usually just lasts 2-3 days with treatment. Sometimes a virus illness is present also and can cause fever despite appropriate antibiotic treatment.